I made a mailbox shaped stove before I discovered vertical and baffle type stoves.I made up 10 of these stoves and I still have them never used them because I had the new idea. You will notice that I use a spark arrestor. To get any cooking done without a baffle, I cut a hole in the top to put my kettle in the fire. I like this stove because I could lay long pieces of fire wood on the ash tray and feed it as it burned. I have to cut my wood into 5" lengths for the vertical stove. The 3" tapered chimney ( 3-18" sections) as shown here is the centerpole for what ever shelter I use. The metal stove jack rests on the flange seen on the spark arrestor picture.